285990 (2001 SK9)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7894131168 ± 2.37e-08
Semi-major axis (a)1.7854348518 AU ± 1.57e-09
Inclination (i)25.84030503° ± 6.18e-06
Long. of Asc. Node (Ω)195.52136492° ± 4.46e-06
Arg. of Perihelion (ω)34.82443230° ± 5.43e-06
Mean Anomaly (M)89.93084301° ± 3.28e-06
Mean Motion (n)0.4131390668°/day ± 5.46e-10
Perihelion dist (q)0.37598916 AU ± 4.22e-08
Aphelion dist (Q)3.19488054 AU ± 4.23e-08
Orbital Period2.38570100 yr ± 3.15e-09
Physical Parameters
H (abs. magnitude)17.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.252″
Uncertainty0
Orbit TypeApollo
MOID0.216238 AU
Observations Used463
Oppositions14
Arc Total2001-2025
First Observation Used2001-09-17
Last Observation Used2025-11-10
Observations (498)
Date Type RA Dec Mag Band Observatory
2008-09-28 20:13:45 C 20 04 14.85 +18 45 53.7 r 240
2008-09-28 20:16:28 C 20 04 15.86 +18 45 43.0 r 240
2008-09-28 20:17:50 C 20 04 16.32 +18 45 36.8 r 240
2008-09-28 20:19:12 C 20 04 16.79 +18 45 30.9 r 240
2008-09-29 21:57:04 C 20 13 19.01 +17 02 58.1 r 130
2008-09-29 21:58:52 C 20 13 19.62 +17 02 51.5 r 130
2008-09-29 22:00:40 C 20 13 20.19 +17 02 44.1 r 130
2008-09-29 22:02:50 C 20 13 20.92 +17 02 35.4 r 130
2008-10-03 02:05:49 C 20 36 10.24 +12 34 18.8 o H55
2008-10-03 02:10:11 C 20 36 11.37 +12 34 04.7 o H55
2008-10-03 02:14:34 C 20 36 12.51 +12 33 50.8 o H55
2008-10-03 02:18:55 C 20 36 13.65 +12 33 36.9 o H55
2008-10-03 02:23:31 C 20 36 14.85 +12 33 22.3 o H55
2008-10-04 21:01:50 C 20 46 54.20 +10 25 18.1 r J53
2008-10-04 21:05:57 C 20 46 55.15 +10 25 06.4 r J53
2008-10-04 21:15:57 C 20 46 57.47 +10 24 38.1 r J53
2008-11-19 03:14:58 C 22 43 04.62 -05 42 05.7 r G96
2008-11-19 03:24:52 C 22 43 05.26 -05 42 06.5 r G96
2008-11-19 03:34:43 C 22 43 05.91 -05 42 07.1 r G96
2008-11-19 03:44:52 C 22 43 06.52 -05 42 08.7 r G96
2012-12-03 07:36:00 C 05 23 53.84 -15 32 13.4 u 807
2012-12-03 07:42:42 C 05 23 53.34 -15 32 17.2 u 807
2012-12-03 07:48:14 C 05 23 52.93 -15 32 20.3 u 807
2013-07-18 14:20:09 C 02 47 59.054 +24 22 54.08 L F51
2013-07-18 14:26:11 C 02 47 59.225 +24 22 52.89 L F51
2013-07-18 14:32:11 C 02 47 59.379 +24 22 51.52 L F51
2013-07-18 14:38:11 C 02 47 59.556 +24 22 50.28 L F51
2013-10-06 04:18:24 C 01 42 46.40 +06 33 32.3 o 691
2013-10-06 04:43:48 C 01 42 44.21 +06 33 10.2 o 691
2013-10-06 05:09:12 C 01 42 42.12 +06 32 48.0 o 691
2013-10-27 07:56:14 C 01 05 20.621 +00 18 37.07 L F51
2013-10-27 08:18:31 C 01 05 19.256 +00 18 24.22 L F51
2013-10-27 08:40:57 C 01 05 17.881 +00 18 11.08 L F51
2013-10-27 09:03:27 C 01 05 16.498 +00 17 58.09 L F51
2016-01-04 05:22:27 C 22 41 04.325 -05 35 47.44 L F51
2016-01-04 05:29:07 C 22 41 05.031 -05 35 44.98 L F51
2016-01-04 05:35:48 C 22 41 05.736 -05 35 43.05 L F51
2016-01-04 05:42:29 C 22 41 06.426 -05 35 40.82 L F51
2017-12-25 10:29:32 S 09 44 44.491 -54 05 24.29 L C51
2017-12-25 13:38:02 S 09 45 27.319 -54 16 27.95 L C51
2017-12-25 19:55:02 S 09 46 54.086 -54 38 27.89 L C51
2017-12-25 23:03:43 S 09 47 38.302 -54 49 33.10 L C51
2018-09-12 09:01:42 C 03 09 37.18 +09 26 30.3 u H21
2018-09-12 09:11:55 C 03 09 36.92 +09 26 26.2 u H21
2018-09-12 09:21:15 C 03 09 36.66 +09 26 22.0 u H21
2019-10-25 13:54:55 C 05 19 15.508 -03 42 02.68 U F51
2019-10-25 14:14:50 C 05 19 14.974 -03 42 12.73 U F51
2019-10-25 14:34:47 C 05 19 14.452 -03 42 22.59 U F51
2019-12-24 08:04:15 C 04 00 30.607 -12 08 45.46 U F51
2019-12-24 08:19:59 C 04 00 29.645 -12 08 45.43 U F51